长度超过1.5km的主要运输平巷或者高差超过100m的人员上下的主要倾斜井巷,应采用机械方式运送人员。()
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高压控制设备装有短路、过负荷、接地和欠压释放保护。()
—Write a memo of words to your boss to include:
—a request to go on the course
—some details about the course(e, g. date, cost)
—why you think the course wilt be useful.
—Write 40-50 words on a separate sheet.